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Table 1 Variables included in additive Bayesian network analysis of the bovine respiratory disease-calf-management practices relationship.

From: Additive Bayesian network analysis of the relationship between bovine respiratory disease and management practices in dairy heifer calves at pre-weaning stage

Variable Variable description Definition Summary statisticsa
(N = 3185)
Colostrum Whether colostrum, including colostrum stored at freezer, was fed calf at the first suckling after birth at the original dairy farmb Binomial
(1: Yes ,0: No)
2556 (80.3%)
Parity Dam parity of calf Binomial
(1:Multiparous , 0: Primiparous )
2292 (72.0%)d
TP Concentration of total protein in serum taken at introduction (g/dl) Continuous 6.00 (SD= 0.73)
Introduction weight Body weight at introduction (kg) Continuous 42.69 (SD= 5.32)
Season Introduction seasons divided into four terms Multinomial
(Autumn: September - November, Winter: December - February, Spring: March - May, Summer: June - August)
Autumn: 792 (24.9%), Winter: 809 (25.4%), Spring: 776 (24.4%), Summer: 808(25.4%)
BRD Whether the calf contracted BRD until weaning after introductionc Binomial
(1: Yes ,0: No)
1409 (44.2%)e
ADG ADG of body weight from introduction to the nursery farm to weaning (kg/day) Continuous 0.94 (SD= 0.24)
  1. TP total protein, BRD bovine respiratory disease, ADG average daily gain
  2. a Percentage of records selecting each value for binomial and multinomial variables and the mean with standard deviation for continuous variables
  3. b All of calves without colostrum feeding were fed replacer instead of colostrum
  4. c BRD records suspected to be prophylactic treatment were ignored
  5. d Number of calves born from multiparous dam
  6. e Number of calves contracted BRD until waning after introduction